13542621 has 4 divisors (see below), whose sum is σ = 18056832. Its totient is φ = 9028412.

The previous prime is 13542577. The next prime is 13542637. The reversal of 13542621 is 12624531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13542621 - 2¹⁹ = 13018333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13542591 and 13542600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13542521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2257101 + ... + 2257106.

It is an arithmetic number, because the mean of its divisors is an integer number (4514208).

Almost surely, 2^13542621 is an apocalyptic number.

It is an amenable number.

13542621 is a deficient number, since it is larger than the sum of its proper divisors (4514211).

13542621 is an equidigital number, since it uses as much as digits as its factorization.

13542621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514210.

The product of its digits is 1440, while the sum is 24.

The square root of 13542621 is about 3680.0300270514. The cubic root of 13542621 is about 238.3604746287.

The spelling of 13542621 in words is "thirteen million, five hundred forty-two thousand, six hundred twenty-one".